hi,
i'm looking for yaoi or shounen-ai manga recommendation (preferably completed series/story wherein Guy A falls in love/is currently together with Guy C. However, Guy C has the same name (first name, last name or nickname, etc) as Guy A's former lover (We'll call him Guy B). Guy B and Guy C are different people.

I don't know if such a manga exists, but after reading a bit of Ikumen datte Koishimasu ([url]http://www.mangaupdates.com/series.html?id=80936[/url]), i begin to wonder.

thanks in advance.

Seven Days is a good one, the same name thing is an important piece of the plot.

These don't follow the specific scenario you detailed, but they do contain various takes on "the same name" as a theme:

"At Home Holiday Lover" from Sentimental Garden Lover

"Dannetsu Senjou no Kodou" from Ouji no Hakoniwa